Climate activist Greta Thunberg and actor Liam Cunningham have joined an international group of human rights activists on a dangerous journey. The mission aims to peacefully break the Israeli blockade of the Gaza Strip while drawing attention to the region's dire humanitarian crisis.

Thunberg and 11 other activists are on board a ship headed to Gaza with aid supplies, but the IDF has said it does not intend to allow the ship to dock.

IDF planning to intercept vessel if it approaches Strip; in video message, Thunberg tells crowd at Macklemore concert to stand against 'genocide' while calling to 'free Palestine'